MacOS only is used in some Silicon Valley companies, but that’s a bubble. You’d be hard pressed to find it used in the rest of the business world anywhere.

As a support/sales engineer for the last 20 years, the number of Macs I see both my coworkers and my customers using is huge. And this is across lots of different markets: Aerospace, finance, software, content creation, etc.

Macs are cheaper on a TCO basis than Windows machines, with IBM finding they save $273 - $543 per Mac they deploy, and they need less than half the number of support people for Macs compared to Windows.